package com.example.booksshop.service;

import com.example.booksshop.entity.User;

import java.util.List;

/**
 * @author xuan 2021/9/15
 */
public interface UserService {
   public String userExsit(String username, String password);

   void insert(User user);

   User select(int id);

   void delete(Integer id);

   int update(User user);

   List<User> show();
}
